Solvothermal synthesis of hollow glass microspheres/Fe3O4 composites as a lightweight microwave absorber |
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Authors: | Qiangchun Liu Zhenfa Zi Min Zhang Peng Zhang Angbo Pang Jianming Dai Yuping Sun |
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Affiliation: | 1. School of Physics and Electronics Information, Huaibei Normal University, Huaibei, 235000, People’s Republic of China 2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, People’s Republic of China
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Abstract: | Hollow glass microspheres/Fe3O4 (HGMs/Fe3O4) composites with low density were successfully synthesized by solvothermal method at 160 °C. The morphology, composition, and microstructure of the samples were characterized by scanning electron microscopy and X-ray diffraction, respectively. The results show that the HGMs/Fe3O4 composites exhibit compact and continuous Fe3O4 particles coating on the surface of HGMs. The complex permeability and permittivity of HGMs/Fe3O4 composites obtained at 160 °C for different reaction times were measured in the frequency range of 1–18 GHz by vector network analysis. The microwave absorption properties were well-elucidated by the traditional coaxial line method. The as-prepared HGMs/Fe3O4 composites show excellent microwave absorption properties. When the thicknesses of these HGMs/Fe3O4 composites are more than 1.5 mm, they all exhibit strong absorption peaks (lower than ?10 dB). A possible mechanism of the improved microwave absorption properties was discussed. |
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